I've written at least 700 B2B and B2G proposals over my career. The first 200 or so were written for Deloitte during my work there as a professional proposal writer. Most of the engagements sought were from around $50k to $4+ million in scope. So, I know very well how to project manage significant undertakings, including government RFPs. After Deloitte, I spent a decade at a regional CPA firm, where I probably averaged another one per week. So, that's roughly 500+ more. Hence, my ballpark range. I've probably been known to remark "nearly a thousand" from time to time, but I suppose that's a slight exaggeration.